The top U.S. border official celebrated another significant downturn in the number of people attempting to illegally cross the U.S.-Mexico border, and credited the Trump administration’s efforts to secure partners south of the border for the change.

In August, just under 51,000 people were arrested for illegally crossing the southwest border while a bit over 13,000 people presented at ports of entry, acting U.S. Customs and Border Protection Commissioner Mark Morgan announced at the White House Monday afternoon. The total 64,006 total figure encountered is down 56% from the peak of 144,000 at the height of the border crisis in May. It was 82,000 in July.